 What are the symptoms of vagal nerve compression? Well, it can start off with weird stuff like dizziness and lightheadedness and difficulty swallowing. It can even be headaches and neck pain and back pain. It can be, now again, a palpitation and arrhythmia, issue with your lungs, an issue with your stomach. The vagus nerve is heavily involved in the stomach. So guess what? Acid reflux is a known cardiovascular risk factor